can't extract office 07 enterprise

i downloaded office 2007 enterprise, and it came up as heaps of rar files (parts). they look lifke this:

Microsoft.Office.2007.Enterprise.German.part10.rar

i got this error:

! C:\Program Files\BitComet\Downloads\Microsoft.Office.2007.Enterprise.German.iso-HS\Microsoft.Office.2007.Enterprise.German.part01.rar: Cannot create Microsoft.Office.2007.Enterprise.German.iso

! The process cannot access the file because it is being used by another process.

please help!!!

This would, necessarily, be an illegal copy of Office 2007, since it’s not distributed in .rar form or by torrent. You might want to try Open Office, a freeware alternative which is torrented.