Ahh yes, we're in a WinXP group. ;-)
    Checking my system i see that in WinXP the Indeo Codecs
should be there already.
    With the same date as most WinXP SP2 files (2004-08-04):
[IR50_*.*] - Indeo Video 5.x Codec files
[IR41_*.*] - Indeo Video 4.x Codec files
[IYUV_32.dll] - Indeo Video 2.x(IYUV) Codec file
    (and still at the WinXP SP0 date (2001-08-18):)
[IR32_32.dll] - Indeo Video 3.x Codec file

Check the 'Device Manager' (Sort: Devices by type) : 'Sound Video
and Game Controllers' : 'Video Codecs' : 'Properties' :

I have separate entries for the different versions listed there.

I don't remember having had any problems with [games or anything
using] the Indeo codecs under WinXP, so i can't really help any.
Sorry.

But, hang on, i do see that i several years ago did download/save
a file [indeo xp.exe](2202870 Byte), supposedly from Ligos, so
supposedly there was/is some issue with the files that comes with
WinXP that i read about and that made me download that installer.
Can't remember having ever used it though.

That filename, including the space, in your favorite
search-engine ... always scan what you download for malware.

I HopeThatHelps