sp2
 

i know i've asked this before, but i just wanted a definite answer yes /no i wanted to upgrade to 4.0 but i wanna make sure that hoster 4.0 will run with sp2, can't risk updating to sp3 caused of prior problem..

4.0 will run with SP2, however there may be problems that cannot be fixed unless you update to SP3. Some beta testers had problems with audio/lyrics sync and other quirks. You do have version 3.4 included in the install so you can revert to using that if you have problems or update to SP3.

does 3.4 have the same feature as the 4.0?

3.4 is the same as 3.321 except it is made to run with the 4.0 reg# so you won't have to to any uninstall reinstall to swap out if anything happened that 4.0 needs to shut down. You just click the 3.4 & continue your show in a matter of seconds. It is included with the 4.0 download.