PSU connectors, CPU and RAM should fit in... the only difference is the Pegatron mobo has three PCIe x 1 slots while the ASRock only has one PCIe X 1 slot but it may only be an issue if you use more than 1 PCIe X 1 card... everything else is perfectly compatible.
Pegatron mobo Expansion slots:
1 PCI Express x16 slot
3 PCI Express x 1 slots
ASRock mobo Expansion Slots:
1 x PCI Express x16 slot
1 x PCI Express x1 slot
2 x PCI slots
N68C-GS FX CPU Support List
http://www.asrock.com/mb/NVIDIA/N68C-GS%20FX/?cat=CPU
The DDR2 RAM sticks from the Pegatron mobo should go in the ASRock's blue sockets
N68C-GS FX Product Specifications
http://www.asrock.com/mb/NVIDIA/N68C-GS%20FX/?cat=Specifications