No way on the customizations so far from what I've seen unless you add a 3rd party app on. That goes for the Metro UI workarounds as well.
The main problems besides the Metro seen here however have to do with setting up any dual boot of 8 with 7. When booting into 7 from 8 a lengthy list of drive errors resulted from the 7/8 RP dual boot not previously seen with the 7/8 CP dual boot. Both Windows versions suddenly began locking up as soon as the desktop finished loading. The Check Disk tool got 7 running normally again until an overdue clean install went on.
Following that I decided to change from Native ide to AHCI mode and whamo 7 saw everything go smoothly while the RP simply would no longer load! That's when I simply to split up the second OS drive for a Linux/Windows on VBox setup of both 7 and 8 where the RP failed to finish once again!
No 8 VMs on Linux for sure!
The CP went onto the latest VM Player without a hitch while the RP simply would not. By the time I saw that as well as the 8 on VM problem with Linux and the drive errors on two OS drives it didn't much to figure out that 8 was going in reverse and becoming a "crap OS"! When going to get the old Vista case running again to loan out to a friend who wouldn't be in a financial situation to build a new case to replace his old XP system that went doa I ended up having some extras around to now see a second 7 Pro mini tower in progress!
Gee two 7 systems and no "8 mares" to think about! Can't go wrong there!