[CentOS] Eeek, my centos6 box won't boot after broken update, need help w/ yum

Hello there,

I think I've shutdown my box right in the middle of a yum update.. The latest kernel installed won't simple boot, and the old one can, but only in init 3 mode (tty).

From a console, I wanted to complete the yum update and it suggested me to do a `yum-complete-transaction`.

yum-complete-transaction tells me that 447 elements are left to run in 1 transaction, runs and show lots of "Removing <packagename> - ud from the transaction" then processes lots of stuff, and ends with listing lots of duplicate packages (mostly Xorg stuff) and.. and that's all. Same stuff if I start that command again.

A `yum cleanup` doesn't change it.

Any hint how I could get of that deadly loop?

Regards,