sliding doors

[bsffamily]

Can anyone help in sugesting ways to fit sliding doors to an existing external door frame ie do's and dont's.
Friend picked up 2 sliders from the auction and wants me to fit to a studio building as external doors! which is a bit odd as I think thay may be internal doors. How can I tell the difference? They seem quite good quality and are glazed. does anyone know where to pick up the sliding mechanisms , Its the ones that the door hangs off and slots into on the floor.
There is an existing wooden frame that I will have to adapt to fit the doors into. But wonder if it might be more of a headache than is worth.
cheers

[stoneyboy]

bsffamily,
I think your last line sums up this project "it might be more of a headache than is worth". Don't do it!
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