3-tier for a message board application?

Hi,

I've got a VB.Net + ASP.Netmessage board application which has
already been customized. There are two solutions in this application.
1. The front end aspx, aspx.vb files, User controls solution
2. A components solution which has .vb files which have the code to
call inserts, updates, deletes to the database (SQL server 2000)

Its much like the available general ASP.Netmessage board. Only a bit
customized. Right now a simple interaction flow from front end to
database is like this.

aspx (aspx.vb) --> usercontrols.vb --> components.vb (call for a
stored procedure in the DB) --> Database

My requirement is to understand if its possible to port this
application to a 3-tier architecture. This is to standardize all
similer applications I have to a 3-tier architecture, not because I am
looking at performance, maintinance etc.

What is the best way to do it?
I have considered couple of options.
1. Have Webservices that facilitates db interaction (What
components.vb does now)
2. Right complus components to do the same as in option 1.

I don't see a clear feasibility of the above options that I 've put
down, Is there a best way to emerge with a worthy 3-tier architecture
for this requirement? If so, what is it and how can it be
accomplished.
Any feasible idea for a 3-tier architecture is fine.

Please reply at the earliest.

Thanks much in advance,
Vin