Regex question - asp.net iis url rewrite

Question

Could anyone help me with this regex issue?

^(Songs|Albums)$
becomes
{R:1}.aspx

This gives you songs.aspx, albums.aspx

wondering if I can do this in Regex:

^(Songs|Albums|Songs/List)$

and how do I get SongsList.aspx from Songs/List?

Thanks!

Edit
This worked:
^(Songs|Albums)/(List)?$
{R:1}{R:2}.aspx

Answer 1

This worked:
^(Songs|Albums)/(List)?$
{R:1}{R:2}.aspx