next n records interfaces

am having a problem with my next_n records interface.

I have a query for my index page, so when you click on a lettter the appropriate artists are shown....
see here

http://www.musicexplained.co.uk/index.cfm

the query depends on a url variable.

<cfquery name="results" datasource="#APPLICATION.DataSource#">
SELECT *
FROM artist_art
WHERE bandname_art like '#url.firstletter#%'
</cfquery>

i am now setting up a next records interface, so you can easily browse through the artists who begin with a for example, this interface is also dependant on an URL variable....<cfset startrownext>
however, when I click on the next button, see here
http://www.musicexplained.co.uk/index_list_1.cfm?firstletter=a
i lose the variable which is powering the index in the first place..

is there anyway round this?

regards