EPCs to Swim lane

Hello All,

I need guidance and tips to convert  EPCs into Swim Lane process maps (such as Visio) manually?

I am referring to a repository where the processes were detailed as EPC  diagrams, I need to recreate the process maps as swim lane in Visio.

The challenge is:

1. The roles are not associate in EPCs. Even though, I am preparing the initial drafts and need not assign exact role at this time, I can keep place holders  -  but how do I bracket the tasks into lanes?
2. I don't have access to ARIS license, the repository I am referring is only web based (backend is ARIS)  - so cant convert EPC to swimlane using a tool

Would really appreciate any suggestion 

Many Thanks!

Sree