I used Maya Unlimited 6.5. I installed Maya Bonus Tools 6.5 in the right directory and checked all bonus tools' plug-ins. Maya starts with no error messages... but a lot of tools doesn't work like "Edge Path Selection Tool", "Toggle Face Display",... with dis kinda messages :
For example : "Edge Path Selection Tool"
// Error: -onc "optionVar -iv QT_edgePathAutoComponentConvert 1;
//
// Error: Unterminated string. //
// Error: -onc "optionVar -iv QT_edgePathAutoComponentConvert 1; ...
Second Kinda Example : "Toggle Face Display"
// Error: Cannot find procedure "doMenuComponentSelection". //
I don't know whatz wrong 
I check lots thing... with the docs but i didn't find a way to solve it.
(I use the userSetup dat comes from BonusTools).
I installed Maya Bonus Tools 6.5 here : /Users/Shared/Alias/maya/6.5
Maya
6.5
Data
Docs
Icons
V Modules
Plug-ins
Scripts
Skeletons
///////////////// MY userSetup.mel > /Users/kurl/Library/Preferences/Alias/maya/6.5/scripts/userSetup.mel //////////
MJPolyTools;
cpsInstallMenu;
////////////////////////////////
// bonusTools userSetup.mel
////////////////////////////////
//
// if you have an existing userSetup.mel file you will need to append
// this code to have all the bonusTools available
// cut and paste the contents of this file into your existing userSetup.mel
// and restart maya to get the full effect
// scriptJob to rebuild menu as working mode changes
scriptJob
-permanent
-event "MenuModeChanged" "bonusToolsMenu";
// build the menu the first time
bonusToolsMenu;
// publish (ctrl+RMB in channelBox)
// aka Quick Connect Attributes
// uncomment the next line if you wish to use this functionality
//publish;
// shift + rmb poly context sensitive marking menu
// the following lines allow you to take
// advantage of it - comment them out or remove them
// if you do not want this functionality
string $btPath = whatIs bonusToolsMenu
;
int $numCharacters = size($btPath)
;
$btPath = endString $btPath ($numCharacters-24)
;
$numCharacters = size($btPath)
;
$btPath = substring $btPath 1 ($numCharacters-18)
;
$btPath = ($btPath + "ModelEdMenu.mel");
eval( "source "" + $btPath + """ );
///////////////////////////////////
// end bonusTools userSetUp.mel
///////////////////////////////////
And i run Maya Unlimited on Mac Os X - G4 (2x1Ghz) - Ati Radeon 9000