A fast 030 bassed system is perhaps the most compatable for playing whd installed games and even for playing frfom the original floppies.
The 040 is deffinatly the most incompatable and its copyback functionality is pain in the backsided and is what breaks most games. I cant really speak for 060 but i imagine all its various caches upset the odd install since no game ever imagined seeing let alone prepared for the power of the 060. Alsoalot of the older games require caches to be switched off and this causes emense slowdown on the 040 due to slow chipram access.
The NOAUTOVEC tooltype is what i surgest using if you have all sorts of weird and wonderful hardware attached where the interupts can reak havok. I use it by default on my own machine in the prefs file. Also NOCHIPCACHE is best used on PPC card bassed system since chipram is not cachable on those cards. NOCACHE is usualy the saving grace of making an older game work on 040/060. Usualy the caches are disabled from within the slave itself, but not always depends on what system the slave was developed on in the first place.
The tcp issue is known though and whdload can automaticaly make ya interfaces go on/offline when ya setup the scripts in the whdprefs file, or anyother script/prog for that matter.