Reverse Engineer Stored Proc

[Flexyware]

I received a request to document 5 stored procedures, (SQL Server). The database structure (tables etc...) is not available to me. I am fairly fluent with Stored Proces, but with each stored proc roughly 30 pages in length I was hoping to see some reverse engineering process.

Can any guru give advise on possible ways to reverse engineer a stored proc under the above constraints.

The end result is basically a RTF explaining the workflow of the each stored proc.