Just for reference, it is possible to integrate a lot of drivers and stuff and keep Windows XP install source under 700 MB.
My Windows XP SP3 I386 source folder after integrating the latest updates is about 470 MB. This includes Internet Explorer 8 and Windows Media Player 11, the latest MassStorage Drivers 14.11.191, Ricks/YumeYao's Runtime Addon 2.2.3, Ricktendo and YumeYao's Common Printer Drivers and XPS Addon, User-Mode Driver Framework version 1.9 and more. To keep the size small I have removed a lot of legacy drivers. Remind you this is about drivers for very old hardware, released before 2001.
This results in a driver.cab file of only 19 MB.
Other things I have removed are Microsoft Netmeeting and MSN Explorer.
My complete CD is around 500 MB now (including DOCS, SUPPORT and ValueADD) excluding the OEM folder. I have kept the LANG folder though and not removed any critical files or services.
So you then have about 200 MB for Driver Packs. This allows integrating Chipset, Massstorage complete support, LAN and WAN drivers. The Sound driver pack is very big. I suggest to not bother integrating these, but install the sound drivers manually.
If you need help removing specific stuff you can contact me.
I also removed OOBE and OEMBIOS.BIN files, but I can not discuss removing that here.
About integrating additional software and stuff. This is also possible on a CD after integrating DriverPacks, but to accomplish this you will have to remove some Windows XP components that can affect the functionality. I do not recommend this, and instead I strongly recommend to use a secondary CD for these or better move to using DVD's as you won't have this problem and as a bonus have better read disc performance (I'm not really sure about this last statement, but I think so as DVD discs have a higher data density).
Currently my Unattended install folder contains about 1 GB of files of which the following are big:
Adobe Flash Player plugins for ActiveX and Firefox: 36 MB
Adobe Reader 11.0.14: 74 MB
LibreOffice 5.0.4 and latest help files: 217 MB
Microsoft Security Essentials including the latest security definitions: 127 MB
Microsoft .NET 2.0, 3.5SP1 and 4.0 and localized files: 104 MB
Mozilla Firefox 43.0.4 including addons, custom themes and more: 60 MB
Mozilla Thunderbird 38.5.1 including addons: 36 MB
Nero 8 Lite: 32 MB
Oracle Java JRE 8.0 update 72: 47 MB
Using a DVD I don't have to worry of running out of available disc space, when integrating newer versions of these software packages.
Edited by Acheron, 25 January 2016 - 11:46 PM.