[TYPO3-shop] Reducing LIST view => Showing only products with specific values?

[Stefan Thun]

Hi,

I would like to reduce the LIST view of tt_product to some records with 
specific values! Example: Showing only products with a timestamp higher 
than a specific value. For testing I tried to select the tstamp-field, 
which did´t work, while "orderBy" on the same level works fine:

plugin.tt_products {
	conf.tt_products.LIST {
		orderBy = tstamp     => ORDERING WORKS!
		where = tstamp>1164175815     => SELECTION DOESN´T WORK!
		andWhere = tstamp>1164175815     => ALSO DOESN´T WORK!
	}
}

How can I select the LIST view to specific products by where-clauses or 
anything similar? Isn´t there realy no way in TypoScript by using things 
like the "select"-commands? I can´t believe that! If there´s no 
TS-way... do you know any other?

Thanx in advance for some hints!
Stefan