Oooh...I know! First, let me ask you where you got SS2 from? It may be important, but not at the moment.
Ok, you say you're having problems INSTALLING it? Easy.
Let's assume you got the CD.
Run the SS2 setup.exe from the CD-ROM with the parameter '-lgntforce'. Just select 'Run' from your start menu, type in 'x:\setup.exe -lgntforce', replacing 'x' with the letter
that your CD drive uses. That should enable you to install.
Ok, assuming that
the Force luck is with you, you've installed the game. SS2 was never designed for Win XP, so there may be a host of other problems.
If none of the movies play and/or are skipped instantly, then it's your old codecs that are causing the problem. Run the file 'iv5play.exe' located on the SS2 CD-ROM first. This will install the drivers and codecs needed to view the movies. You may need to do this after each reboot of your system. You can also register the video drivers by running from the start menu's 'Run' command:
'regsvr32 x:\ss2\LGVID.AX' You will need to change x:\ss2\ to the
directory where you installed System Shock 2
into.
A VERY useful thread about all of the known Win XP errors and solutions can be found here:
http://ttlg.com/forums/showthread.php?t=69958All right, let's now assume you got the HOTU version of SS2. That version uses special DivX codecs, so instead of getting them from the CD (which you probably haven't got, if you need to DL the HOTU SS2), go to
www.divx.com and just get the latest DivX codecs from there. Anything else is covered in the above mentioned thread.
Moving autoexec.nt is beyond my knowledge, but since SS2 is actually a Windows 9x game, it has hardly any '16-bit DOS features' in it so I cannot tell you how or how not moving autoexec.nt will work. However, I'm pretty sure it just dislikes the NT environment, not the lack of a DOS environment.
I downloaded the HOTU SS2 once, found that it didn't work, uninstalled it, found the solution to my bug, downloaded it again and installed it, and I'm now panicking during the first 15 mins of the game because it. Is. Scary.

This is all the help I can offer and I hope you've found it helpful.
As for Chaos Gate. Sorry, I haven't got that game.
