Apologies for bumping an old admin thread, JaiKai.
I'm a forum admin facing the same problem you described: DTO Garage Plus stopped working after the 4.2.2 PL1 vB upgrade. (I found this thread via Google.)
I've got it partially restored at this point, but I'm missing something key. Any chance we could exchange email on what you did to get it going again?
If so, please PM me here or e-mail me darin at mirageforum.com
cheers
Darin