Aggregate Comments in Workflow

Hi,

I have a requirememnt that is when anyone recieves a workitem he han forward it to another user (There is abutton Refer in my Transaction) .When i Refer the Workitem to another user its mandatory To write comments.

For the next user there is a Log displayed in workitem (transaction ) with the comments.

So i have put a loop and used the same Task so that the workitem continues.

Now how do i handle the comments.

I tried using a database table to store comments .but it restricts comments to 255 chars.

Anyway to store the comments as the comments definetely excedd 255 chars