Help with Phrases

[dancue]

I'm trying to adjust a phrase to include a referrerid. I don't know where to start.

Here is the translation so far:

{4}/register.php?referrerid={}

What's in red is what needs to be included. I don't know where the number within the "{}" is defined. Obviously I can't just include any number.

Can anyone point me in the right direction?

[Dismounted]

{1}/register.php?referrerid={2}
To use (in templates):
<phrase 1="$vboptions[bburl]" 2="$bbuserinfo[userid]">$vbphrase[PHRASENAME]</phrase>

[dancue]

Thank you!