hmm first id say you'd need to learn how to read tab, which is pretty simple if you dont know it already..
then id download a program called 'Guitar Pro 5' its really helpful because it can actually play the tab for you and theres also a tuner :P
heres a quick guide to reading tab...
A tab staff for guitar has 6 horizontal lines, each one representing a string of the instrument. The bottom line of the staff represents your lowest "E" string (thickest), the second line from the bottom represents your "A" string (the thinest),
Notice that there are numbers located smack dab in the middle of the lines (aka strings). The numbers simply represent the fret the tab is telling you to play. For example, in the illustration above, the tab is telling you to play the third string (third line) seventh fret.
Note: When the number "0" is used in tablature, this indicates that the open string should be played.
Here an example tab :P
Guitar
Aadd2
E E E E E E E E E E E E E E E E
E||------------------------------|--------------------------|
B||------------------------------|--------------------------|
G||*-----------------6-----------|--------------6-----------|
D||*-----------9--------9-----9--|--------9--------9-----9--|
A||---------7-----7--------7-----|-----7-----7--------7-----|
E||---5--------------------------|--5-----------------------|
F#madd2
E E E E E E E E E E E E E E E E
-------------------------------|--------------------------|
-------------------------------|--------------------------|
-------------------2-----------|--------------2-----------|
-------------6--------6-----6--|--------6--------6-----6--|
----------4-----4--------4-----|-----4-----4--------4-----|
--2----------------------------|--2-----------------------|
Dsus2 Esus2
E E E E E E E E E E E E E E E E
-----------------------------|------------------------------|
-----------------------------|------------------------------|
-----------9-----7-----------|-----------11-----9-----------|
--------7-----------7-----7--|--------9------------9-----9--|
--5-----------5--------5-----|--7------------7--------7-----|
-----------------------------|------------------------------|
Aadd2
E E E E E E E E E E E E E E E E
-----------------------------|---------------------------||
-----------------------------|---------------------------||
-----------------6-----------|--------------6-----------*||
-----------9--------9-----9--|--------9--------9-----9--*||
--------7-----7--------7-----|-----7-----7--------7------||
--5--------------------------|--5------------------------||
Duration Legend
---------------
W - whole
H - half
Q - quarter
E - 8th
S - 16th
T - 32nd
X - 64th
. - note dotted
|-n-| - n-tuplets
Tablature Legend
----------------
L - tied note
x - dead note
g - grace note

- ghost note
> - accentuded note
NH - natural harmonic
AH - artificial harmonic
TH - tapped harmonic
SH - semi harmonic
PH - pitch harmonic
h - hammer on
p - pull off
b - bend
br - bendRelease
pb - preBend
pbr - preBendRelease
brb - bendReleaseBend
\n/ - tremolo bar dip
\n - tremolo bar dive
-/n - tremolo bar Release up
/n\ - tremolo bar inverted dip
/n - tremolo bar return
-\n - tremolo bar Release down
S - shift slide
s - legato slide
/ - slide into from below or out of upwards
\ - slide into from above or out of downwards
~ - vibrato
W - wide vibrato
tr - trill
TP - tremolo picking
T - tapping
S - slap
P - pop
< - fade in
^ - brush up
v - brush down