[SL] newbie question regarding laptop POS

[Hall F. <hei...@io...>]

Hello, this has probably come up before but I can't find the answer I'm 
looking for.
I have a mixed OS environment consisting of the following computers
(Linux server - Kubuntu server edition  - household lan )
Mac G3 - 10.3.9
Windows XP Home
Compaq Presario 1685 Laptop ( non-wireless but does have ethernet ) this 
will be the GPS and POS machine
and finally another linux server that my websites are hosted on in 
another city where I do NOT have root access nor postgresql capability.

My thoughts are this.
I would like to be able to have a central place where my accounting 
takes place that is accessible from any of the other machines.
I'm thinking the laptop would be a good candidate for this as it will 
need to be used when we go to craft shows and such to sell our 
products.  I doubt we will have wireless capability because most are in 
farm country.
I need it to store the credit card processing information and sale 
history, print a receipt/invoice for the customer.
I use joomla as my CMS and Virtuemart as my ecommerce software. 
My ideal scenario is that sql-ledger would be able to import via csv or 
some other method my days activities ( virtuemart uses mysql ) and 
updates its accounting accordingly.  Lacking that we don't do so much 
business via the net that we couldn't enter them by hand for now.
but when we come home from shows, we need to be able to synchronize the 
data thats on the laptop with the server. ( if its not the main machine 
already ).  Similarly when we are in the office at home I want to be 
able to access the sql-ledger program from any of the desktop machines 
or laptop be it xp or mac or even the linux clients.

I don't know the best way to install/build sql-ledger to fit my needs, 
or if it really will.  I'm not very good at accounting and really am 
tired of looking.  I would really appreciate any and all help.
Thanks
Troy