I done so today and it's very straightforward.
We quickly figured out the door wouldn't take a universal kit therefore we needed to order all Lotus original parts. Here are a list of the parts you need -
A117M6064F (switches x 2)
A075W1030Z (screw x 6)
A075W4015Z (washer x 10)
A117W4194F (spacer x 6)
A907E6285F (Nut x 8 )
B117U0390F (Motor RH x 1)
B117U0389F (Motor LH x 1)
B117U0391H (window lift plate x 2)
A082W4099F (washer x 4)
A075W3049F (nut x 4)
A117U0345K (window backplate x 2)
A117U0344J (window bezel switch x 2)
All in all the total cost came to £448.09. That was at 15% VAT so will obviously be a wee bit higher now.
The windows are pre-wired on MY04 Toyota cars and later - you can find the wires in behind the door skin wrapped up in sticky tape. And it's a simply plug and play! Earlier cars will need be wired which will probably be more hassle than its worth.
If any one wants step by step guidance on the install just drop me a PM.