The most interesting one newwink.gif
These files seems to be safe to delete from the installation source (taken from the original IE.INF:
InternetExplorer.rem
CODE
dhtmled.oc
html32.cn
iefiles5.in
ieinfo5.mo
ieinfo5.oc
msconv97.dl
mswrd632.wp
mswrd832.cn
triedit.dl
write32.wp

There are a couple of files that I'm not sure about:
CODE
;hmmapi.dl
;install.in[code]

And there is also IEFILES.INF that includes this list of files for IE: [code]advapi32.dl
advpack.dl
browselc.dl
browseui.dl
ckcnv.ex
comctl32.dl
crypt32.dl
enhsig.dl
iemigrat.dl
iesetup.dl
imagehlp.dl
imghelp.dl
inseng.dl
jobexec.dl
jscript.dl
jsproxy.dl
msaahtml.dl
mshtml.dl
msoss.dl
msxml.dl
occache.dl
ole32.dl
oleaut32.dl
olepro32.dl
rsabase.dl
rsaenh.dl
rsapi32.dl
rsasig.dl
schannel.dl
shdoc401.dl
shdocvw.dl
shell32.dl
shlwapi.dl
url.dl
urlmon.dl
vbscript.dl
webcheck.dl
win.co
wininet.dl
winsock.dl
wintrust.dl
wsock.vx
wsock32.dl
wsock32n.dl
I have not checked it yet.
I ommited IEXPLORE.EXE because it needed to fool some programs that check if it is on the system before installing or even running.
I'd personally ommit MSHTML.DLL and MSHTML.TLB because I need them for running WebCraft.

Any ideas what else we can delete from the source? Or maybe what files we should keep from deleting?