The answer is - possibly. Maybe not. But possibly...
Admittedly, it's not entirely in our hands.
Keighley are in the last qualifying spot on 6 points and a + 18 difference.
On Sunday they play Oldham who are on -70 - so a narrow Oldham win at Keighley would give them 6 points and a minus points difference (and reduce Keighley's points difference slightly).
London Skolars and the Scorpions have 3 points each, with two games to play - so they need to gain fewer than 3 points from their remaining games. Skolars play 'Fax on Sunday and the Scorpions have yet to come to us.
Hornets have no points and a -56 difference (better than either Dewsbury and Oldham). Say Oldham beat Keighley by 8 points, leaving them on +10, we would need to gain six points and better the +10 difference to get into 4th place.
So, given that the other results go in our favour, a ten point winning margin against Dewsbury would leave us needing to beat the Scorpions by 57 points (46 + 11) to nick 4th.
It's not over till the fat lady sings.