And adding a bar is a simple case of... well, here's an example:
Code:
screen hpbars:
frame:
xmaximum 450
xalign 1.0
yalign 0.72
vbox:
hbox:
vbox:
text currentplayer.name
hbox:
text "HP"
bar value currentplayer.currenthp range currentplayer.maxhp
hbox:
text "SP"
bar value currentplayer.currentsp range currentplayer.maxsp
vbox:
hbox:
text "Lv. "
text "[currentplayer.level]"
text "[currentplayer.currenthp]/[currentplayer.maxhp]"
text "[currentplayer.currentsp]/[currentplayer.maxsp]"
You can fiddle around with where you want to put it on the screen, and which exact vboxes and hboxes and frames and so on you're using, too.