How to put yesterday in the winscp script?

I have to make one winscp transfer script to transfer file.
For example:
The date of today is 20090626
Then the path is e:\files\20090625\ and the file name is 20090625_abc.txt

How to use script to transfer the file?

Could anyone help on this issue?

If any one know about the solution, you also can send me email tom.shen@ge.com?

See some example.