Question about using Y-cables with a PSU

I've got limited 4pin molex cables inside my case and for a future upgrade I may need use another 6pin PCI cable when I've already got my existing one in use. My question is can I use a 4pin to 2x4pin Y splitter then plug both of those 4 pins into a 6pin PCI Ysplitter, not sure how else to explain it so I'll try with a diagram (apologies)

4pin
/ \
4pin 4pin
\ /
6pin PCI

Spliting a 4pin into two 4pins then those two 4 pins into 1 6pin. Is this even possible or am I likely to explode my computer and all surounding equipment with my sheer stupidity?

Thanks.

It should work. Remember the amount of leads from a PSU isn't how many it can handle. Also keep in mind that the splitter isn't using 8 cables it is only using 3 per molex and as fas as having all that daisy chained it'll work cause every GPU shipped comes with a molex to 6 pin splitter and most are only one cable instead of two. I don't know how else to explain it but trust me it'll work.

That was the plan, to split 1 molex into 2 then use another Y-splitter to put those two molex into a PCI but I wasn't sure if it would actually work or not.

That's fantastic, I didn't realise they did those I'll have to look deeper in the shops next time. It's not so much that I'm short on molex it's more that I've got a big case and despite my cable management I can only get 1 maybe two near enough to actually be of any use near the cards. I don't want to clutter it up.

http://www.dclstore.co.uk/desc-ezc [...] -1735.aspx
that's the PSU I've got, I was tight on money at the time my old one died and I didn't hear any bad reviews about that particular brand and it was shortly after that I realised just how touchy PSUs can be. feel free to slate it =s