I just got GTA IV and installed it on my 120GB HD...still have over 70GB free....as I'm playing the game...and am driving around....the game hiccups for lack of a better word every so often...everything just stops..completely for about a second or 2?..is this normal?...is it just the level loading off the HD?..my HD is new....would it be better to uninstall it and just play it off the disc?....what's the dilly-yo on this?

I have GTA 4 installed to my 120gb hdd and its fine, no hiccups/freezes etc. Maybe theres a problem with your hdd?

GTA IV definitely played better off the disk at 8x than my 20gb hdd.

Playing from the HDD caused a lot more pop-in's of everything. Although the loading might have been faster, the general gameplay was much better playing off the disk.