try
<xml>
<node memo=" Hello,
\n\n
In this tab "order" you can order the next things:
\n\n
1. Vehicle's
2. Vehicle upgrade
3. Sell your vehicle's
\n\n
The max vehicle's to buy are 5!
\n\n
Nice driving,
\n\n
LexLife team." />
<node buyMemo=" Hello,
\n\n
In this tab you can buy a vehicle, but we are busy at the system so for now, you cant.
\n\n
Nice driving,
\n\n
LexLife team." />
</xml>
or you could split both them into seperate xml's and use this for each xml (or if you are feeling more adventurous, get lua to split them up from the same xml )
node = xmlLoadFile("hai.xml")
nodetext = xmlNodeGetValue(node)
and yes you will need to add to your meta.xml (remember to type run the command 'refresh' to make server load the meta.xml changes)