LinkEX

Hi,
I would like to know how I can work around to adding A-B-C trade manually.

For instance, I arrange with other webmaster that

I link his site let's call it www.a.com from my site site www.b.com, and he links to my site www.c.com.

the recip is going from his site, to my other site, however there is no way to specify this in the add link screen, so
when i check link, it says backlink not found...

is there anyway to add an other field to linkex so that if i have a trade, such as above

i can specify

link to: www.a.com
recip link from: www.a.com
recip link to: www.c.com

and when i click check link, it will be green OK?

thanks