pcmcia cards must be taken out yes , unless u have the timer fix or sw solve.
Software fix for this is on AMINET and its easy to use.
as for poseidon, i use poseidon here and i dont need to turn that OFFLINE to use whdload, but miamidx must be offline.
the interuppt fixes are supposedly beeing looked at but since this is an hard way to go and would most likely cripple more games, well i rather not see it fixes (as i know what the consequences will be) , but for whdload NG ,i hope for this to be fixed + RTG and usb etc support..
AS for you who want the installers on a cd, buy aminet cds then, the latest have em all i guess (except for the last ones...after the cd was printed, also magazines have theese installers there) and for freely games ermm thats a hard one as you can read from the sites around, its not legal to redistrubute any of em without some sort of an agrement, hence u are better of downloading it yourself.
beyond all this, if 15 usd is too much for you or anyone to pay for a sw that will make all your old amiga games work on hdd + on a highly hacked one, well thats your loss i guess!!!.
and for USB mouse , did you know that you have to RECODE every single game to get your mouse to work with the game? , sorry but i think that will never happen unless usb creators will make some sort of mouseport emulation (which will ofcourse slow down your setup even more etc....)