hi again sirs (Tomcat & tommyp)!
as always, many thanks for your feedback!
i just want to share what i've accomplished over the weekend (i was still using 503c though to make isos) ...
here's what i've found out:
(1) here are the added folders to the i386 dir + their contents:
041b
D:\SOURCESS\I386\041b\wmpshell.dll.mu_
D:\SOURCESS\I386\041b\xpsp2res.dl_
D:\SOURCESS\I386\041b\mlang.dll.mu_
D:\SOURCESS\I386\041b\wmm2res2.dll.mu_
D:\SOURCESS\I386\041b\wmploc.dll.mu_
041e
D:\SOURCESS\I386\041e\wmpshell.dll.mu_
D:\SOURCESS\I386\041e\xpsp1res.dl_
D:\SOURCESS\I386\041e\xpsp2res.dl_
D:\SOURCESS\I386\041e\browselc.dl_
D:\SOURCESS\I386\041e\inetres.dl_
D:\SOURCESS\I386\041e\mlang.dll.mu_
D:\SOURCESS\I386\041e\mshtmler.dl_
D:\SOURCESS\I386\041e\msoeres.dl_
D:\SOURCESS\I386\041e\shdoclc.dl_
D:\SOURCESS\I386\041e\wab32res.dl_
D:\SOURCESS\I386\041e\wmm2res2.dll.mu_
D:\SOURCESS\I386\041e\wmploc.dll.mu_
0402
D:\SOURCESS\I386\0402\wmploc.dll.mu_
D:\SOURCESS\I386\0402\wmpshell.dll.mu_
D:\SOURCESS\I386\0402\xpsp2res.dl_
D:\SOURCESS\I386\0402\mlang.dll.mu_
D:\SOURCESS\I386\0402\msi.dll.mu_
D:\SOURCESS\I386\0402\shdoclc.dl_
D:\SOURCESS\I386\0402\wmm2res2.dll.mu_
D:\SOURCESS\I386\0402\wmm2res.dll.mu_
0418
D:\SOURCESS\I386\0418\xpsp2res.dl_
D:\SOURCESS\I386\0418\mlang.dll.mu_
D:\SOURCESS\I386\0418\shdoclc.dl_
D:\SOURCESS\I386\0418\wmm2res2.dll.mu_
D:\SOURCESS\I386\0418\wmm2res.dll.mu_
D:\SOURCESS\I386\0418\wmploc.dll.mu_
D:\SOURCESS\I386\0418\wmpshell.dll.mu_
0425
D:\SOURCESS\I386\0425\wmpshell.dll.mu_
D:\SOURCESS\I386\0425\xpsp2res.dl_
D:\SOURCESS\I386\0425\mlang.dll.mu_
D:\SOURCESS\I386\0425\shdoclc.dl_
D:\SOURCESS\I386\0425\wmm2res2.dll.mu_
D:\SOURCESS\I386\0425\wmm2res.dll.mu_
D:\SOURCESS\I386\0425\wmploc.dll.mu_
0426
D:\SOURCESS\I386\0426\wmpshell.dll.mu_
D:\SOURCESS\I386\0426\xpsp2res.dl_
D:\SOURCESS\I386\0426\mlang.dll.mu_
D:\SOURCESS\I386\0426\shdoclc.dl_
D:\SOURCESS\I386\0426\wmm2res2.dll.mu_
D:\SOURCESS\I386\0426\wmm2res.dll.mu_
D:\SOURCESS\I386\0426\wmploc.dll.mu_
0427
D:\SOURCESS\I386\0427\xpsp2res.dl_
D:\SOURCESS\I386\0427\mlang.dll.mu_
D:\SOURCESS\I386\0427\shdoclc.dl_
D:\SOURCESS\I386\0427\wmm2res2.dll.mu_
D:\SOURCESS\I386\0427\wmm2res.dll.mu_
D:\SOURCESS\I386\0427\wmploc.dll.mu_
D:\SOURCESS\I386\0427\wmpshell.dll.mu_
(2) on the early stages of slipstreaming, HFSLIP reported that a particular KB added some folders; i tried taking it out though but the same additional folders (above) still showed up in SOURCESS
(3) i think i already resolved my XPize issue ... it was totally my bad ...

... i was using an XPized SP2 SOURCESS (as XPize has a feature to create a bootable XPized ISO) ... when i just used SOURCESS from HFSLIP, T-13 didn't show anymore the installation prompts of XPize ... oh well, a lesson learned!

(4) would RyanVM's Windows XP Post-SP2 Update Pack work hand in hand with HFSLIP? you see, in 1 of my experimental builds, i checked the contents of the package & removed from the HF directories those files that are in the cab file ... now when i ran qfecheck, it only shows those that were in the addon pack ... & not those in the HF folders ... i've attached a text file for your reference
(5) these 2 don't seem to do anything for the system: Themes_rytukz_VistaCG_addon_v1.0.cab Themes_rytukz_VistaCG_addon_v1.1.cab ... i tried each 1 at a time & i tried even having both ... to no avail (no theme added for me to use) ... checking both files though do not seem to show any pic file ... btw, 1.0 has a bigger size compared to 1.1 due to the difference in compression
(6) would it be possible to replace snap ons like dfrg.msc via HFEXPERT\APPREPLACEMENT?
(7) would the reference (or update at least) for slisptreaming CODECS be applicable to XP too? apparently, the discussion in a different thread is for 2K
(8) is there a difference between letting HFSLIP integrate SP than doing it manually?
(9) just a follow up, i know it might be too much to ask but could the entire process (from start to finish) be generated as a separate report too (so that we can see all the messages/errors/processes that have transpired during the run of HFSLIP)
(10) lastly, about timing the slipstreaming process, would it be alright to request for the start & end times be included in the log as well?
cheers!