Each one of us may have or will ( int the near future) use HijackThis, and some time b4 i even mentiioned of myself using this cool software to kill Search Assistant....... here is some entries that we usually c wen we run HijackThis

R0,R1,R2,R3 - Internet Explorer Start/Search page URLs
F0,F1,F2,F3 - Autoloading Programs
N1,N2,N3,N4 - Netscape, Mozilla Start/Search page URLs
O1 - Host file redirection
O2 - Browser helper objects
O3 - Internet Explorer Toolbars
O4 - Autoloading programs from Registry
O5 - IE Options icon not visible in control panel
O6 - IE Options access restricted by Administrator
O7 - Regedit access restricted by Administrator
O8 - Extra Items in IE right click menu
O9 - Extra items in main IE toolbar, or Extra items in IE tools menu
O10 - Winsock hijacker
O11 - Extra group in IE 'Advanced options' menu
O12 - IE plugins
O13 - IE default prefix hijack
O14 - 'Reset Web settings' Hijack
O15 - unwanted site in trusted zone
O16 - ActiveX Objects
O17 - Lop.com domain hijackers
O18 - Extra protocols and Protocol hijackers
O19 - User style sheet hijack
O20 - AppInit_Dlls Registry value autorun
O21 - SSODL autorun Registry Key
O22 - sharedTaskScheduler autorun Registry key
ME - what i would do

Take care